Inventor

HE HENRY X

CA4 patents

⚠️ This page may combine multiple inventors who share the name “HE HENRY X”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

VETCO GRAY INC

2 patents

US7823634B2Nov 2, 2010

Wellhead isolation sleeve assembly

VETCO GRAY INC12 citations81

US7647989B2Jan 19, 2010

Backup safety flow control system for concentric drill string

VETCO GRAY INC5 citations67

HE HENRY X

1 patent

US9103183B2Aug 11, 2015

Method and apparatus for launching multiple balls in a well

HE HENRY X17 citations74

CHAN KWONG O

1 patent

US8141641B2Mar 27, 2012

Backup safety flow control system for concentric drill string

CHAN KWONG O3 citations50